JP6068282B2 - Wireless sensor terminal - Google Patents

Wireless sensor terminal Download PDF

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JP6068282B2
JP6068282B2 JP2013153386A JP2013153386A JP6068282B2 JP 6068282 B2 JP6068282 B2 JP 6068282B2 JP 2013153386 A JP2013153386 A JP 2013153386A JP 2013153386 A JP2013153386 A JP 2013153386A JP 6068282 B2 JP6068282 B2 JP 6068282B2
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尚一 大嶋
尚一 大嶋
賢一 松永
賢一 松永
近藤　利彦
利彦 近藤
森村　浩季
浩季 森村
加々見　修
修 加々見
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Nippon Telegraph and Telephone Corp
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Description

本発明は、自然環境等の状態変化をセンシングする技術に関する。   The present invention relates to a technique for sensing a state change of a natural environment or the like.

近年、温度や振動、光量等の環境情報を取得する多数の無線センサ端末を身の回りに配置し、検知された情報を収集して解析することによりサービスを提供するセンサネットワークが商用化されつつある。図６は、従来の無線センサ端末の内部構成である。自端末内に備える電源部からの電源電圧によりセンサ回路等の構成群を駆動している（特許文献１）。   In recent years, sensor networks that provide services by arranging a large number of wireless sensor terminals that acquire environmental information such as temperature, vibration, and light quantity around the person, and collecting and analyzing the detected information are being commercialized. FIG. 6 shows an internal configuration of a conventional wireless sensor terminal. A configuration group such as a sensor circuit is driven by a power supply voltage from a power supply unit provided in the terminal (Patent Document 1).

特開２００４−０２４５５１号公報Japanese Patent Laid-Open No. 2004-024551

しかしながら、無線センサ端末の構成群を電源部で駆動するため、所定の時期に電池を交換する必要があった。これについて太陽電池を利用する方法も考えられるが、全ての構成群に電圧が常時供給され恒常的に消費されるため、この消費量を上回るような大きさや性能を持つ太陽電池が必要となり、無線センサ端末のサイズやコストが増大してしまう。   However, since the group of wireless sensor terminals is driven by the power supply unit, it is necessary to replace the battery at a predetermined time. A method using a solar cell is also conceivable, but since a voltage is constantly supplied to all the constituent groups and constantly consumed, a solar cell having a size and performance exceeding this consumption is required, and wireless The size and cost of the sensor terminal will increase.

本発明は、上記事情を鑑みてなされたものであり、無線センサ端末内でのエネルギー消費量を改善し、無線センサ端末の低コスト化を図ることを目的とする。   The present invention has been made in view of the above circumstances, and an object thereof is to improve the energy consumption in a wireless sensor terminal and to reduce the cost of the wireless sensor terminal.

請求項１に記載の無線センサ端末は、外環境に起因する環境エネルギーを電気エネルギーに変換する発電素子と、前記電気エネルギーを蓄積する蓄電素子と、前記環境エネルギーによって内部の接点が電気的に接触して入出力端が導通状態に変化した時に、前記蓄電素子に蓄積されている電気エネルギーを無線伝送部に供給する接点型センサ素子と、前記接点型センサ素子から供給された電気エネルギーで駆動し、駆動時に信号を無線伝送する無線伝送部と、を有し、前記無線伝送部で単位時間あたりに消費される電気エネルギーの量は、前記蓄電素子に単位時間あたりに蓄積される電気エネルギーの量よりも大きく、前記無線伝送部は、前記接点型センサ素子が前記導通状態に変化したことを前記信号として無線伝送することを要旨とする。 The wireless sensor terminal according to claim 1, wherein a power generation element that converts environmental energy caused by an external environment into electric energy, a power storage element that stores the electric energy , and an internal contact are electrically contacted by the environmental energy . and when the input and output terminals is changed to the conduction state, a contact-type sensor element which supplies the electric energy stored in the energy storage device to radio transmission section, driven by an electric energy supplied from the contact-type sensor element And a wireless transmission unit that wirelessly transmits a signal during driving, and the amount of electrical energy consumed per unit time by the wireless transmission unit is the amount of electrical energy accumulated per unit time in the power storage element. greater than the amount, the radio transmission unit is summarized in that the radio transmission that the contact-type sensor element is changed to the conduction state as the signal

請求項２に記載の無線センサ端末は、請求項１に記載の無線センサ端末において、前記無線伝送部に供給される電気エネルギーの電圧値を制御する電圧制御回路を更に有することを要旨とする。 The wireless sensor terminal according to claim 2 is the wireless sensor terminal according to claim 1 , further comprising a voltage control circuit that controls a voltage value of electric energy supplied to the wireless transmission unit.

請求項３に記載の無線センサ端末は、請求項１又は２に記載の無線センサ端末において、前記無線伝送部は、前記接点型センサ素子が前記導通状態である時間内で前記信号を無線伝送する高速起動型信号発振器を有することを要旨とする。 The wireless sensor terminal according to claim 3 is the wireless sensor terminal according to claim 1 or 2 , wherein the wireless transmission unit wirelessly transmits the signal within a time in which the contact sensor element is in the conductive state. The gist is to have a fast start-up type signal oscillator.

請求項４に記載の無線センサ端末は、請求項１乃至３のいずれかに記載の無線センサ端末において、前記接点型センサ素子が前記導通状態である時間を計測する駆動時間計測部を更に有し、前記無線伝送部は、前記駆動時間計測部で計測された前記導通状態である時間のデータを更に無線伝送することを要旨とする。 According to a fourth aspect of the present invention , the wireless sensor terminal according to any one of the first to third aspects further includes a drive time measuring unit that measures a time during which the contact sensor element is in the conductive state. The wireless transmission unit further wirelessly transmits the time data in the conduction state measured by the driving time measurement unit.

請求項５に記載の無線センサ端末は、請求項１乃至４のいずれかに記載の無線センサ端末において、自端末の識別情報を生成する識別情報生成回路を更に有し、前記無線伝送部は、前記接点型センサ素子が前記導通状態である時に前記識別情報を更に無線伝送することを要旨とする。 The wireless sensor terminal according to claim 5 further includes an identification information generation circuit that generates identification information of the terminal itself in the wireless sensor terminal according to any one of claims 1 to 4 , wherein the wireless transmission unit includes: the Proximity sensor element is summarized in that the further wireless transmission the identification information at a the conducting state.

以上より、本発明によれば、接点型センサ素子と無線伝送部を環境エネルギーやそれに基づく電気エネルギーで駆動し、接点型センサ素子の駆動時に蓄電素子内の電気エネルギーを無線伝送部に供給するため、無線センサ端末内でのエネルギー消費量が抑制され、無線センサ端末の低コスト化を実現できる。   As described above, according to the present invention, the contact-type sensor element and the wireless transmission unit are driven by environmental energy or electrical energy based thereon, and the electrical energy in the storage element is supplied to the wireless transmission unit when the contact-type sensor element is driven. The energy consumption in the wireless sensor terminal is suppressed, and the cost of the wireless sensor terminal can be reduced.

本発明によれば、無線センサ端末内でのエネルギー消費量が抑制され、無線センサ端末の低コスト化を実現できる。   ADVANTAGE OF THE INVENTION According to this invention, the energy consumption in a wireless sensor terminal is suppressed and the cost reduction of a wireless sensor terminal is realizable.

第１の実施形態の無線センサ端末の内部構成を示す図である。It is a figure which shows the internal structure of the wireless sensor terminal of 1st Embodiment. 第２の実施形態の無線センサ端末の内部構成を示す図である。It is a figure which shows the internal structure of the wireless sensor terminal of 2nd Embodiment. 第３の実施形態の無線センサ端末の内部構成を示す図である。It is a figure which shows the internal structure of the wireless sensor terminal of 3rd Embodiment. 第４の実施形態の無線センサ端末の内部構成を示す図である。It is a figure which shows the internal structure of the wireless sensor terminal of 4th Embodiment. 第５の実施形態の無線センサ端末の内部構成を示す図である。It is a figure which shows the internal structure of the wireless sensor terminal of 5th Embodiment. 従来の無線センサ端末の内部構成を示す図である。It is a figure which shows the internal structure of the conventional wireless sensor terminal.

本発明は、（１）接点型の接点センサ素子を利用し、（２）接点センサ素子と無線部を環境エネルギーで駆動し、（３）蓄積された環境エネルギーを接点センサ素子の駆動時に無線部に供給することにより、モニタリング時における無線センサ端末のエネルギー消費量を極小まで抑制し、無線センサ端末の低コスト化を実現し、センサデータを低コストで収集するようにしている。   The present invention uses (1) a contact-type contact sensor element, (2) drives the contact sensor element and the radio unit with environmental energy, and (3) stores the stored environmental energy when the contact sensor element is driven. By supplying to the wireless sensor terminal, the energy consumption of the wireless sensor terminal during monitoring is suppressed to a minimum, the cost of the wireless sensor terminal is reduced, and sensor data is collected at a low cost.

以下、本発明を実施する一実施の形態について図面を用いて説明する。   Hereinafter, an embodiment for carrying out the present invention will be described with reference to the drawings.

〔第１の実施の形態〕
図１は、第１の実施の形態に係る無線センサ端末の内部構成を示す図である。この無線センサ端末１は、環境発電素子１１と、蓄電素子１２と、接点センサ素子１３と、無線部１４とで構成される。 [First Embodiment]
FIG. 1 is a diagram illustrating an internal configuration of the wireless sensor terminal according to the first embodiment. The wireless sensor terminal 1 includes an energy harvesting element 11, a storage element 12, a contact sensor element 13, and a wireless unit 14.

環境発電素子１１は、自然環境等の外環境の状態又はその状態の変化によりエネルギーを発生させる素子である。例えば、太陽電池（光電素子）、温度差発電素子、振動発電素子等である。   The energy harvesting element 11 is an element that generates energy according to the state of an external environment such as a natural environment or a change in the state. For example, a solar cell (photoelectric element), a temperature difference power generation element, a vibration power generation element, or the like.

蓄電素子１２は、一端が環境発電素子１１の出力端に接続され、電荷エネルギーを蓄積する素子である。例えば、コンデンサや二次電池等である。   The storage element 12 is an element that has one end connected to the output end of the energy harvesting element 11 and accumulates charge energy. For example, a capacitor or a secondary battery.

接点センサ素子１３は、一端が蓄電素子１２の他端に接続され、振動、温度変化、衝撃等が一定以上の値となった場合に、内部の接点が電気的に接触して両端間が導通状態となり、一方、非導通状態ではリーク電流以外のエネルギーを消費しない接点型の素子である。例えば、ボール型接点センサやサーミスタ等である。   The contact sensor element 13 is connected at one end to the other end of the electricity storage element 12, and when the vibration, temperature change, impact, etc. become a certain value or more, the internal contact is in electrical contact and the both ends are conductive. On the other hand, it is a contact-type element that does not consume energy other than leakage current in the non-conducting state. For example, a ball-type contact sensor or a thermistor.

無線部１４は、入力端が接点センサ素子１３の他端に接続され、入力された電気エネルギーを用いて信号を出力端から無線伝送する回路である。例えば、各種の論理回路や、水晶振動子等の発振素子を用いた信号発振器を組み合わせて実現される。   The wireless unit 14 is a circuit that has an input end connected to the other end of the contact sensor element 13 and wirelessly transmits a signal from the output end using the input electrical energy. For example, it is realized by combining various logic circuits and a signal oscillator using an oscillation element such as a crystal resonator.

次に、無線センサ端末１の動作について説明する。   Next, the operation of the wireless sensor terminal 1 will be described.

まず、接点センサ素子１３（例えば、サーミスタ）が非導通状態において、環境発電素子１１（例えば、温度差発電素子）により、設置環境内の温度変化による温度エネルギーが電気エネルギーに変換されて蓄電素子１２に蓄積される。   First, when the contact sensor element 13 (for example, the thermistor) is in a non-conducting state, the energy generation element 11 (for example, the temperature difference power generation element) converts the temperature energy due to the temperature change in the installation environment into electric energy, and the storage element 12 Accumulated in.

その後、その設置環境内の温度が閾値を超えると、その温度上昇により接点センサ素子１３が導通状態に変化し、蓄電素子１２に蓄積されている電気エネルギーが接点センサ素子１３を介して無線部１４に供給される。   Thereafter, when the temperature in the installation environment exceeds the threshold value, the contact sensor element 13 changes to a conductive state due to the temperature rise, and the electric energy accumulated in the power storage element 12 is transmitted through the contact sensor element 13 to the wireless unit 14. To be supplied.

ここでの接点センサ素子１３は、温度上昇という外環境の状態変化による環境エネルギーで初めて駆動し、その駆動時、つまり当該状態変化という外部信号を検知した時に、その検知情報を電気エネルギーに変換するセンサとして機能している。   The contact sensor element 13 here is driven for the first time with environmental energy due to a change in state of the external environment, such as a temperature rise, and when that drive is detected, that is, when an external signal of the state change is detected, the detection information is converted into electrical energy. It functions as a sensor.

最後に、接点センサ素子１３から供給された電気エネルギーで無線部１４が初めて駆動され、その駆動時に、その電気エネルギーを用いて検知用の信号が無線で他の装置に伝送される。   Finally, the wireless unit 14 is driven for the first time with the electric energy supplied from the contact sensor element 13, and at the time of driving, a detection signal is wirelessly transmitted to another device using the electric energy.

本無線センサ端末１によれば、電気エネルギーが時間に応じて蓄電素子１２に継続して蓄積され、接点センサ素子１３の接点が接触した瞬間にのみ電気エネルギーを解放するため、モニタリング時やセンシングの待ち時間においてほとんどエネルギーを消費しない。   According to the wireless sensor terminal 1, electrical energy is continuously accumulated in the power storage element 12 according to time, and the electrical energy is released only at the moment when the contact of the contact sensor element 13 comes into contact. Almost no energy is consumed during the waiting time.

これにより、仮に、蓄電素子１２に単位時間あたりに蓄積される電気エネルギーの量に比べて、無線部１４で単位時間あたりに消費される電気エネルギーの量が大きいような場合でも、センサの検知時間が短ければ十分動作することが可能となり、環境発電素子１１の小型化が可能となる。従い、無線センサ端末のサイズを小さくできる。   Thereby, even if the amount of electrical energy consumed per unit time in the wireless unit 14 is larger than the amount of electrical energy stored per unit time in the power storage element 12, the detection time of the sensor If it is short, it becomes possible to operate sufficiently, and the energy harvesting element 11 can be miniaturized. Accordingly, the size of the wireless sensor terminal can be reduced.

本実施の形態によれば、接点センサ素子１３と無線部１４を環境エネルギーやそれに基づく電気エネルギーで駆動し、接点センサ素子１３の駆動時に蓄電素子１２内の電気エネルギーを無線部１４に供給するので、無線センサ端末１内でのエネルギー消費量が抑制され、無線センサ端末１の低コスト化を実現でき、半永久的に動作させることが可能となる。   According to the present embodiment, the contact sensor element 13 and the wireless unit 14 are driven by environmental energy or electrical energy based thereon, and the electrical energy in the power storage element 12 is supplied to the wireless unit 14 when the contact sensor element 13 is driven. The energy consumption in the wireless sensor terminal 1 is suppressed, the cost of the wireless sensor terminal 1 can be reduced, and it can be operated semipermanently.

〔第２の実施の形態〕
図２は、第２の実施の形態に係る無線センサ端末の内部構成を示す図である。この無線センサ端末１は、電圧制御回路１５を更に備えて構成される。それ以外は、第１の実施の形態で説明した無線センサ端末１と同様である。 [Second Embodiment]
FIG. 2 is a diagram illustrating an internal configuration of the wireless sensor terminal according to the second embodiment. The wireless sensor terminal 1 further includes a voltage control circuit 15. Other than that, it is the same as the wireless sensor terminal 1 described in the first embodiment.

電圧制御回路１５は、接点センサ素子１３と無線部１４との間に介在するように接続され、接点センサ素子１３から無線部１４に供給される電気エネルギーの電圧値を最適に調整する回路である。   The voltage control circuit 15 is connected so as to be interposed between the contact sensor element 13 and the wireless unit 14, and is a circuit that optimally adjusts the voltage value of electric energy supplied from the contact sensor element 13 to the wireless unit 14. .

本実施の形態によれば、無線部１４に供給される電気エネルギーの電圧値を最適に調整するので、無線部１４の動作を安定化できる。   According to the present embodiment, the voltage value of the electric energy supplied to the wireless unit 14 is optimally adjusted, so that the operation of the wireless unit 14 can be stabilized.

〔第３の実施の形態〕
図３は、第３の実施の形態に係る無線センサ端末の内部構成を示す図である。この無線センサ端末１は、無線部１４の信号発振器を高速起動信号発振器１４ａに変更して構成される。それ以外は、第２の実施の形態で説明した無線センサ端末１と同様である。 [Third Embodiment]
FIG. 3 is a diagram illustrating an internal configuration of a wireless sensor terminal according to the third embodiment. The wireless sensor terminal 1 is configured by changing the signal oscillator of the wireless unit 14 to a fast start signal oscillator 14a. Other than that, it is the same as the wireless sensor terminal 1 described in the second embodiment.

高速起動信号発振器１４ａは、接点センサ素子１３の駆動時間内で信号を生成する高速起動型の信号発振器である。例えば、起動時間が１ｎｓ以下である高速起動のリング発振器や、ＦＢＡＲ・ＳＡＷデバイス等の水晶振動子よりもＱ値が低い素子を共振器として使用した発振器等である。   The fast start signal oscillator 14 a is a fast start type signal oscillator that generates a signal within the drive time of the contact sensor element 13. For example, a fast-starting ring oscillator having a startup time of 1 ns or less, an oscillator using an element having a Q value lower than that of a crystal resonator such as an FBAR / SAW device as a resonator, or the like.

これまでの実施の形態では、起動時間が１０ｍｓ程度である水晶振動子を信号発振器として用いていた。一方、接点センサ素子１３が導通状態である時間が短い場合を考慮し、本実施の形態では、その短時間でも無線部１４が信号を送信できるように高速起動型の信号発振器を用いるようにする。   In the embodiments so far, a crystal resonator having a startup time of about 10 ms has been used as a signal oscillator. On the other hand, in consideration of the case where the contact sensor element 13 is in a conductive state for a short time, in this embodiment, a fast start signal oscillator is used so that the wireless unit 14 can transmit a signal even in a short time. .

本実施の形態によれば、接点センサ素子１３が導通状態の時間内で信号を生成する高速起動信号発振器１４ａを用いるので、その起動時間で消費するエネルギーを抑制しつつ極短時間で信号を送信できる。   According to the present embodiment, since the fast start signal oscillator 14a that generates a signal within the time when the contact sensor element 13 is in the conductive state is used, the signal is transmitted in a very short time while suppressing the energy consumed in the start time. it can.

〔第４の実施の形態〕
図４は、第４の実施の形態に係る無線センサ端末の内部構成を示す図である。この無線センサ端末１は、接触時間計測装置１６を更に備えて構成される。それ以外は、第１の実施の形態で説明した無線センサ端末１と同様である。 [Fourth Embodiment]
FIG. 4 is a diagram illustrating an internal configuration of a wireless sensor terminal according to the fourth embodiment. The wireless sensor terminal 1 further includes a contact time measuring device 16. Other than that, it is the same as the wireless sensor terminal 1 described in the first embodiment.

接触時間計測装置１６は、接点センサ素子１３の駆動時間を計測する装置である。例えば、接点センサ素子１３と無線部１４との間に介在するように接続され、接点センサ素子１３の接点が接触している時間を計測し、無線部１４に送信して信号と共に無線伝送させる。   The contact time measuring device 16 is a device that measures the driving time of the contact sensor element 13. For example, it is connected so as to be interposed between the contact sensor element 13 and the wireless unit 14, and the time during which the contact of the contact sensor element 13 is in contact is measured and transmitted to the wireless unit 14 and wirelessly transmitted together with the signal.

具体的には、接点センサ素子１３の接点が傾斜の際にオンになる場合、接点の接触時間を計測することにより、無線センサ端末１やその端末１が設置された物の現在の傾きを検知できる。この場合、ある傾きを取った際に常に信号を送信し続けるよりも、ある傾きを取った時間情報のみを送信した方がエネルギー的に高効率であるため、接触時間計測装置１６を使用することでエネルギー消費量を抑制しつつ必要なデータを送信できる。   Specifically, when the contact of the contact sensor element 13 is turned on when tilted, the current tilt of the wireless sensor terminal 1 or the object on which the terminal 1 is installed is detected by measuring the contact time of the contact. it can. In this case, since it is more efficient in terms of energy to transmit only time information with a certain inclination than to always transmit a signal when taking a certain inclination, the contact time measuring device 16 should be used. Can transmit necessary data while suppressing energy consumption.

本実施の形態によれば、接点センサ素子１３の接点が接触している時間を計測し、その接触時間のデータを併せて無線伝送するので、無線センサ端末１やその端末１が設置された物の現在の傾きを検知できる。   According to the present embodiment, since the contact time of the contact point of the contact sensor element 13 is measured and the data of the contact time is wirelessly transmitted, the wireless sensor terminal 1 and the object on which the terminal 1 is installed The current inclination of the can be detected.

〔第５の実施の形態〕
図５は、第５の実施の形態に係る無線センサ端末の内部構成を示す図である。 [Fifth Embodiment]
FIG. 5 is a diagram illustrating an internal configuration of a wireless sensor terminal according to the fifth embodiment.

この無線センサ端末１は、ＩＤ生成回路１７を更に備えて構成される。それ以外は、第１の実施の形態で説明した無線センサ端末１と同様である。 The wireless sensor terminal 1 is further provided with an ID generation circuit 17. Other than that, it is the same as the wireless sensor terminal 1 described in the first embodiment.

ＩＤ生成回路１７は、無線センサ端末１の識別情報（ＩＤ）を生成する回路である。例えば、接点センサ素子１３と無線部１４との間に介在するように接続され、接点センサ素子１３の接点が接触した際にＩＤのデータを生成し、無線部１４に送信して信号と共に無線伝送させる。   The ID generation circuit 17 is a circuit that generates identification information (ID) of the wireless sensor terminal 1. For example, it is connected so as to be interposed between the contact sensor element 13 and the wireless unit 14, and when the contact of the contact sensor element 13 contacts, ID data is generated, transmitted to the wireless unit 14, and wirelessly transmitted together with the signal Let

接点センサ素子１３は、外部信号のオン・オフを検知するものであり、厳密なセンサ情報（例えば、駆動波形パターン）を送信する必要が無い。この場合、接点センサ素子１３が接触した瞬間にＩＤデータを送信すれば、センサ情報そのものを送信せずとも外部信号の検知を認識できる。更に、無線センサ端末１の位置情報が既知であった場合、ＩＤデータを送信することにより、どの無線センサ端末１が反応したかを把握でき、簡易な構成でセンサ情報を取得できる。   The contact sensor element 13 detects on / off of an external signal and does not need to transmit strict sensor information (for example, a drive waveform pattern). In this case, if the ID data is transmitted at the moment when the contact sensor element 13 contacts, the detection of the external signal can be recognized without transmitting the sensor information itself. Further, when the position information of the wireless sensor terminal 1 is known, it is possible to grasp which wireless sensor terminal 1 has reacted by transmitting ID data, and sensor information can be acquired with a simple configuration.

本実施の形態によれば、無線センサ端末１のＩＤを生成し、接点センサ素子１３の接点が接触した際にＩＤデータを併せて無線伝送するので、簡易な構成で外部信号を検知できる。   According to the present embodiment, since the ID of the wireless sensor terminal 1 is generated and the ID data is wirelessly transmitted together when the contact of the contact sensor element 13 comes into contact, an external signal can be detected with a simple configuration.

１…無線センサ端末
１１…環境発電素子（発電素子）
１２…蓄電素子
１３…接点センサ素子（接点型センサ素子）
１４…無線部（無線伝送部）
１４ａ…高速起動信号発振器（高速起動型信号発振器）
１５…電圧制御回路
１６…接触時間計測装置（駆動時間計測部）
１７…ＩＤ生成回路（識別情報生成回路） DESCRIPTION OF SYMBOLS 1 ... Wireless sensor terminal 11 ... Environmental power generation element (power generation element)
12 ... Storage element 13 ... Contact sensor element (contact sensor element)
14 ... Wireless section (wireless transmission section)
14a ... Fast start signal oscillator (fast start type signal oscillator)
15 ... Voltage control circuit 16 ... Contact time measuring device (drive time measuring unit)
17 ... ID generation circuit (identification information generation circuit)

Claims (5)

外環境に起因する環境エネルギーを電気エネルギーに変換する発電素子と、
前記電気エネルギーを蓄積する蓄電素子と、
前記環境エネルギーによって内部の接点が電気的に接触して入出力端が導通状態に変化した時に、前記蓄電素子に蓄積されている電気エネルギーを無線伝送部に供給する接点型センサ素子と、
前記接点型センサ素子から供給された電気エネルギーで駆動し、駆動時に信号を無線伝送する無線伝送部と、を有し、
前記無線伝送部で単位時間あたりに消費される電気エネルギーの量は、前記蓄電素子に単位時間あたりに蓄積される電気エネルギーの量よりも大きく、
前記無線伝送部は、前記接点型センサ素子が前記導通状態に変化したことを前記信号として無線伝送することを特徴とする無線センサ端末。 A power generation element that converts environmental energy caused by the outside environment into electrical energy;
A storage element for storing the electrical energy;
A contact-type sensor element supplies the electrical energy stored in the energy storage device to radio transmission section when the internal contact input and output terminals in electrical contact has changed to the conduction state by the environmental energy,
A wireless transmission unit that is driven by electrical energy supplied from the contact-type sensor element and wirelessly transmits a signal during driving ;
The amount of electrical energy consumed per unit time in the wireless transmission unit is greater than the amount of electrical energy stored per unit time in the power storage element,
The wireless sensor terminal wirelessly transmits as a signal that the contact sensor element has changed to the conductive state . 前記無線伝送部に供給される電気エネルギーの電圧値を制御する電圧制御回路を更に有することを特徴とする請求項１に記載の無線センサ端末。The wireless sensor terminal according to claim 1, further comprising a voltage control circuit that controls a voltage value of electric energy supplied to the wireless transmission unit. 前記無線伝送部は、The wireless transmission unit is
前記接点型センサ素子が前記導通状態である時間内で前記信号を無線伝送する高速起動型信号発振器を有することを特徴とする請求項１又は２に記載の無線センサ端末。3. The wireless sensor terminal according to claim 1, further comprising a fast start signal oscillator that wirelessly transmits the signal within a time in which the contact sensor element is in the conductive state. 前記接点型センサ素子が前記導通状態である時間を計測する駆動時間計測部を更に有し、A drive time measuring unit that measures the time during which the contact sensor element is in the conductive state;
前記無線伝送部は、前記駆動時間計測部で計測された前記導通状態である時間のデータを更に無線伝送することを特徴とする請求項１乃至３のいずれかに記載の無線センサ端末。4. The wireless sensor terminal according to claim 1, wherein the wireless transmission unit further wirelessly transmits data of the conduction time measured by the driving time measurement unit. 5. 自端末の識別情報を生成する識別情報生成回路を更に有し、It further has an identification information generation circuit for generating identification information of its own terminal,
前記無線伝送部は、前記接点型センサ素子が前記導通状態である時に前記識別情報を更に無線伝送することを特徴とする請求項１乃至４のいずれかに記載の無線センサ端末。The wireless sensor terminal according to claim 1, wherein the wireless transmission unit wirelessly transmits the identification information when the contact sensor element is in the conductive state.
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